Long-Chain Polysaturated Fatty Acid in Atrial Fibrillation-Associated Stroke: Lipidomic-GWAS Study

全基因组关联研究 内科学 医学 心房颤动 冲程(发动机) 内分泌学 脂肪酸 时尚2 生物 单核苷酸多态性 多不饱和脂肪酸 遗传学 生物化学 六烯酸 基因 基因型 工程类 机械工程
作者
Youngae Jung,Beomsu Kim,Chi Kyung Kim,Hong‐Hee Won,Chae Suhyun,Kyungmi Oh,Min‐Jeong Shin,Geum‐Sook Hwang,Woo-Keun Seo
出处
期刊:Thrombosis and Haemostasis [Thieme Medical Publishers (Germany)]
标识
DOI:10.1055/a-2504-0903
摘要

Background and Purpose This study aimed to explore the relationship between lipidomic domains, particularly free fatty acids (FFAs), and the presence of AF in patients with acute stroke, and to identify mechanisms of AF-associated stroke through genetic studies. Methods A total of 483 patients of stroke in patients without AF (n = 391) and with AF (n = 92) were selected from a prospectively collected stroke registry. Lipidomic profiling was conducted and the lipid components associated with AF were explored using fold-change analyses and clustering. Genotyping was conducted through trait comparison. Colocalization was also performed. Results Among the lipidomic domains, the free fatty acid (FFA) class was positively associated with AF. Long-chain fatty acids with 14-24 carbons and unsaturated FFAs distinguished AF. Clustering analysis based on FFAs revealed differences in AF proportion across groups. GWAS identified two loci associated with clustered groups of FFA metabolites: near MIR548F3 associated with FFA 20:1, FFA 20:2, FFA 22:5, and FFA 22:6; and near RPL37A associated with FFA 22:5 and FFA 22:6. These loci were associated with increased fibrinogen levels. In the GWAS for the FFA metabolite-quantitative trial locus analysis, loci near rs28456 and rs3770088, and FFA 20:4-QTLs were co-localized with the eQTLs of FADS2, a gene involved in the peroxisome proliferative-activated receptor gamma-related signaling pathway, in the whole blood, left ventricle, and atrial appendage tissue. Conclusion Elevated FFA levels, especially those of long-chain unsaturated FFAs, are strongly associated with AF-associated stroke. This relationship is regulated by the peroxisome proliferator-activated receptor gamma-related signaling pathway.
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